Improvements to SSYAlert.  The kludgey isRetainedForAlert property has been removed.  Memory management magic is now provided by SSYWindowHangout instead.  The +sharedAlert method and static variable has been removed since there is no good reason to use it.  A temporary alert obtained from +alert works fine for all purposes and manages its own memory now.
Better understanding of SSYAlert’s stickAround feature, new feature for NSDocumentController+DisambiguateForUTI
Before beginning to bisect SettingsViewController